Tube-repairing clamp



p 1929- H. M. PARVIN TUBE REPAIRING CLAMP Filed y 1928 2 Sheets-Sheet 1Hill/8r Sept. 24, 1929, H. M. PARVIN 1,729,121

TUBE REPAIRING CLAMP Fi ly 1928 2 Sheets-Sheet l 1 I l I l l l I l I l lI Patented Sept. 24, 1929 f UNITED STATES PATENT OFFICE HENRY M. PABVIN,OF OOLFAX, WASHINGTON TUBE-REPAIRING- CLAMP Application filed July 20,

The object of my invention is to provide a novel device to hold tiretubes in placewhile they are being repaired and to provide novel meansfor conveniently and securely stretching the tube and firmly holding itwhile the workman is aflixing the patch to the tube. I attain these andother objects of my' invention 'by the device illustrated in the,accompanying drawings, in which,- I

Figure 1 is a perspective view of my invention ready for use; a Fig. 2is a top plan view of same; Fig. 3 is a longitudinal section on line 33of Fig. 2; Fig. 4 is a transverse section on line 4- 4;

. of Fig. 2;

Fig. 5 is a section on line 5-5 of Fig. 2; Fig. 6 is a detaillongitudinal section with the handle member 21 in reverse position fromthat shown in Fig. 3;

Fig. 7 is a detail perspective view of the under side of the plate andFig. 8 is a perspective view of the top side of a modified plate 25having the slot 29 25 Like numerals indicate like parts in each of theseveral views.

Referring to the accompanying drawings I provide a suitable base plate 1havingthe vertical sides 2 and the vertical end 3. Atfixed to the end 3is a'depending arm 13 which terminates in a segment 15 having the rigidteeth 16, as shown in Fig. l. The sides 2 of base plate 1 are providedwith elongated slots 10, as shown in Fig. 3 in which a rod 9 is mountedand which rod is engaged by the spring 12 affixed to the under side ofbase plate 1, as shown in Fig. 3. I provide nuts 11 on the ends of rod'9, as shown. Mounted on the ends of rod 9 are the side bars 5 of theclamp member. The entire clamp member consists of the side bars 5, and

bars 1 and handles 6, the end portions 4 also having the integralcylindrical sockets 7 which carry the rod 8, whilethe handle carries apin 18 on which the link or handle 17 is pivotally mounted. The link 17has a bifurcated end 19 which in turn carries the U-shaped link handleor lever 21, the pin or pivot 20 connecting said members being oii- 5set from the center of member 21, as shown 'which the side bars 5 arepivoted, the rod 9 1928. Serial No. 294,167..

in Figs. 3 and 6; the handle member 21 also carrying a second ofli'setpin 20 adapted to engage the recesses of the tooth segment 15, as shownin the drawing. Slidably mounted on the side bars 5 are similaradjustable; clamps 23 and 24 which are adapted to engage the edges ofthe tire tube 31 1n the manner illustrated in Fig. 3 to firmly hold thesame over the plate 25 (or 25' as the case may be) While the tube isbeing repaired. I provide a removable plate 25 having studs 26 adaptedto seat in corresponding apertures 27 in the base plate 1 to hold theplate in position and also having projections 28 to slightly raise theremovable plate from the '65 base plate. In the modified plate 25',illustrated in Fig. 8, I provide a slot 29, the ur- .pose of which willhereinafter be descri ed.

The tube is laid on the movable late 25 (or 25) andthe clamp is broughtown on it and fastened by the adjustable handle elements 17 and 21. Thisstretches the tube tight and allows the workman to place the patch onand roll it in order to make it stick closely. There are several platesof various sizes to care for different size tire tubes. Some of theplates are made with holes in the center (as illustrated in Fig. 8) inorder to allow the valve stem to stick through in case the repair hastobe made near the stem.

The special features of my invention consist in the offset adjustableclamps which make it possible to draw the tube tightly over the plate,thereby stretching it considerably sidewise and at the same time notbindingit along the sides of the device. The clamps 24 and 25 aremovable along the side 1 bars 5 in order to take any size tube. Thepivoted ends of the side bars are not fixed rigidly to the frame but areresiliently or adj ustably mounted by means of the engagement of springs12, aflixed to the under side of the base plate and engaging the rod 9on being movable in the elongated slots 10 of the sides 2 of the baseplate 1. The purpose of this is to allow the side bars to hold theadjustable clamps in a positionto move up and down slightly in orderthat the front and back clamps may hold the tube with equal pressure.

to spread sidewise and at the same time be- I ing rigid so far as downpressure is concerned. If these were rigid bars the side bars and theclam s could not spread without distortion. e method of tightening downthe clamps in front of the device by the handle member 21 with theofiset pins 20 and 22 is also a novel feature of my inin any suitablemanner, such as illustrated in Fig. 1. v t

What I claim is:

1. In a device of the class described, the combination of a base platehaving a slot therethrough and havin vertical sides, side clamp barspivotally an adjustably mounted on the side portions of the base plate,a handle for operating the side clamp bars, a depending arm aflixed tothe end of the base plate, said dependin arm having a toothed segmentportion, a link pivotally attached to the handle of the clamp bars, ahandle pivotally connected to the link, a sin offset from the pivotconnecting the ban 1e to the link, said pin being adapted to engage thetoothed segment whereby to tighten the side clamp bars over a tire tubeto be repaired, adjustable clamp members slidably mounted on the clampbars and adapted to engage the edges of the tire tube to stretch thetire sidewise, and a removable plate over which the tube is placed andclamped for repairing, said late havin a slot therethrough alined witthe slot t rough the base plate.

2. In a device of the class describeththe combination of a base platehavin a slot therethrough and having vertical siges, side clamp barspivotally mounted on the side portions of the base plate, the base platehavmg vertical extending elongated slots in its vertical sides, a rodextending throu h said slots and to the ends of which rod t e side clampbars are pivotally connected, and springs attached to the undersideof'the base plate and having their free ends resiliently engaging theaforesaid transverse rod, a handle for operating the side clamp bars, adepending arm affixed to the end of the base plate, said depending armhaving a toothed segment ortion, a link ivotally attached to the han eof the clamp ars, a handle pivotally connected to the .link, a pinofi'set from the pivot connecting the handle to the link, said pin beingadapted to engage the toothed segment whereby to tighten the side clampbars over a tire tube to be repaired, adjustable clamp members slidablymounted on the clamp bars and adapted to engage the edges of the tiretube to stretch the tire SldBWlSG and a removable plate over which thetube ed on the side portions of the base plate, a

handle for operating the side clamp bars, a depending arm aflixed to theend of the base plate, said depending arm having a toothed segmentportion a link pivotally attached to the handle oi the clamp bars, ahandle pivotally connected to the link, a pin offset from the pivotconnecting the handle to vention. The device may be bolted to a benchthe link, said pin being adapted to engage the toothed segment wherebyto tighten the side clamp bars over a tire tube to be remounted on theclamp ars and adapted to .paired, adjustable clam members slidablyengage the edges of the tire tube to stretch the tube sidewise, .aremovable plate over which the tube is placed and clamped for repairing,cylindricalsockets on the end of the side clamp bars, and a rod mountedin said cylindrical sockets and extending across the end of the sideclamp bars.

. 4. n a device of theclass described, the combination of .a base platehaving an opening therethrough, a clamp device pivotally and resilientlymounted on' the base plate and having side bars extending parallel withand close to downturned edge portions of the base plate, said clampdevice including a rigid handle member, a pivotally mounted handlemember linked to the rigid handle member, said pivotally mounted handlemem her having a transverse pin offset from its pivot connectingelement, an arm affixed to the connecting element, an arm aflixed to thebase plate and depending therefrom, said arm having a toothed segmentportion with which the pin of the handle member is engageable for tihtening the side clamp bars down to secure base late. 7 5. n a deviceyhold a tire tube over the "i that-158s described, the

ing therethrough, a clamp device pivotally and resilientl and having sie bars extending parallel with and close to downturned edge portions ofthe base plate, said clamp device including a rigid handle member, apivotally mounted '7 I handle member linked to the rigid handle member,said pivotally mounted handle memher having a transverse pin offset fromits pivot connecting element, an arm afiixed to the base plateanddepending therefrom,

'said arm having a' toothed segment portion with which the pin of thehandle member is engageable for tightening the side clamp combination ofa base plate having an opena mounted onthe base plate U bars down tosecurely hold a. tire tube over i the base plate, a removable platedetachably engaged on the base plate and over which the tire tube isplaced, and side clamp plates slidably mounted on the side clam bars andengageable with the edges of t e tire tube to stretch the tire tubesidewise over the removable plate for convenience in repairing the tiretube.

- HENRY M. PARVIN.

